Reaming machine



L. G M MULLEN REAMI NG MACHINE June 2, 1925.

Filed July 26. 1 22 2 Sheets-Sheet 1 M. Z a m a L M 1 Q u n June 2, 1925.

- L. G. MCMULLEN nmmme MACHINE Filed July 26, 1922 2 Sheets-Sheet 2 7 scribed and claimed, it being miderstood Patenteddtme 2, 192 5.

Application filed Jilly 2e, 1922'.j, a1577, 6;

To all whom z'tmay concern."

' Be it known that 1, Leo G. lvIoMULLnN, a citizen of the United States, residing at Baltimore, in the State of Maryland,have invented a new "and useful Beaming Machine, of

cation.

This invention aims to provide a simple means whereby a 16], 1l'llI1g.0p8Iat1OI1 may' be carried out under conditions in which,

.the use of a reaming machine of'ordinary type would be impossible; V

It iswithin the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains. a With the above and other objects in view,

which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and 111 the details of construction hereinafter dethat, within the scope of what isclaimed,

changes in the precise embodiment of'theinvention shown can be made without departing from the spirit of the invention.

In the accompanying drawings i I I Figure 1 shows in plan, a device"constructed in accordance with the invention,

the upper member of the arm being re-. moved; Figure 2 1s a longltudlnal section;

Figure 3 is a cross section taken through the'arm; Figure 4 is a. fragmental topplan showing amodification; Figure 5 is a section of the structure shown in Figure 4:.

. The numeral 1 marks the vframe of a reaming machine, carrying a reduced projecting arm, denoted generally by the numeral 2, the arm embodying alower member 3 and an up pervmember 1, the upper memberbeing held: on the lower member by securing elements 5. The members 3 and 4 of the arm 2a1'e supplied with cooperating recesses 6 defining a chamber, the upper and lower members of the arm being supplied with reduced openings 7 communicating with the chamber, bearings 8 being located in the openings 7 and having flanges 9 engaging the members 3 and 10f the arm 2 in the chamber formed by the recesses 6.

The'endsof shafts 10 are journaled in certain of the bearings 8. Arshaftllis journaled in the outermost bearing andhas 5 a tool holdlng means whlch may be'in the which the following is a specifi- I chamber and carried by the shafts.

a socket 12 of any olesired shape.

Intermeshing pinions 14 are located in the chamber defined by the recesses 6 and are,

carried by the shafts 10 and 11. The innermostpinio-n 14 meshes with a gear wheel '15 on a shaft 16, the shaft 16 being powerdriven and beinglocated in the frame 1, the lower end of'theshai't '16 beingjournaled in, a bearing 17 mounted in an open? ing in thelower member3 of the arm .2, the V bearing having a laterallyprojecting flange 19 engaging armiZ. V

In practical operation, when the shaft 16: is rotated, motion is transmitted by the the lower member 2 of the gear wheel 15 and the pinions 14 to the tool holding shaft 11, the reamer or other tool being rotated. It is obvious that since the machine inclu'des the'reduced' arm :12, the reaming operation can be carried out under conditions which would be impossible in the absence ofthe arm.

' A useful but not mandatory adjunct is delineated in Figure 5 of the drawings. If i r q desired,the upper member 4 of. the arm 2 may be provided with seats 20,'par,ts hereinbefore described being designated, in Figures 4 and :5 by numerals previously used, with the suflixfia. The seats 20 are adapted to receive thereduced fingers 21 on the lower end of aremovable bridge 22 carry-fl ing anadjustable pressure-member, such as a screw 23, threaded into the bridge, the screw. comprising a center point 24 and a turning head '25. Obviously, through the instrumentality ofthe screw 23,; the work may be held in place or, considered from a different viewpoint, the arm 2 maybe held to the work. I

What is claimed is 1.In a device of the class described, a frame having 'a reduced projecting arm, embodying a lower member, an upper member and securing elements connecting said members, the members of the arm being supplied with cooperating recesses defining a" chamber, said members of the arm being equipped with reduced openings communieating with the chamber, bearings located in the openings and engaging said members of the arm within the chamber, shafts journaled in the bearings, the outermostjshaft being provided with tool-holding means, and intermeshingpinions located in the 2. In a device of the class described, a frame provided with a reduced arm, a driving shaft at the inner end of the arm, adriven shaft at the outer end of the arm 5 and equipped with. tool-holding,,1neans,-

substantially parallel to the axes of rotation of the shafts.

In testimony; that I claim the foregoing as my own, I have heretoaflixed my signature inthe presence of two Witnesses.

LEO G; MOMULLEN.

'VVitnesses WM.F. RONAN, R. J. NELSON. 

